Sirocco or Roamless for Japan?

2 brands checked on 27/10/2026 · published by Mocom SAS (Sirocco)

Brands compared: Sirocco, Airalo, Holafly, Orange Travel, Instabridge, Roamless, aloSIM, Kolet, Sim Local, Eskimo, eSIM.me and Jetpac

As of 27/10/2026, out of 16 trips compared in Japan: Sirocco ranked higher on 0, Roamless on 16; average gap 9%.

Sirocco Our eSIM

Ranked higher on 0 of the 16 trips comparedSee Sirocco for Japan ›

Roamless

Ranked higher on 16 of the 16 trips compared★ 4.8 · 3,295 reviewsOfficial website ›

The verdict, by type of trip

Short stay3 days, 5 GBRoamless€8.89 against €9.00 with Sirocco (1% more)
One week7 days, 5 GBRoamless€8.89 against €9.00 with Sirocco (1% more)
Unlimited7 days, unlimitedRoamless€21.02 against €23.20 with Sirocco (10% more)
Family of 44 travellers, 7 days, 5 GB eachSirocco Our eSIM€32.40 against €35.56 with Roamless (10% more)

A written rule, the same for every pair: for each type of trip, the better ranked of the two on price per GB (for unlimited, on price), at the prices we checked. Nothing is picked by hand; customer ratings don't count.

Prices, trip by trip

For each trip, each brand's cheapest plan that covers the duration and the data. In green, the better ranked of the two: price per GB, not counting GB beyond one and a half times the data requested (for unlimited, price). "+x%", how much more the other one costs, per GB when the data differs.

Prices, trip by trip
Trip	Sirocco Our eSIM	Roamless
3 days
1 GB, 3 days	€3.80that's €1.27/day8% more expensive	€3.53that's €1.18/dayRanked higher
5 GB, 3 days	€9.00that's €3.00/day1% more expensive	€8.89that's €2.96/dayRanked higher
10 GB, 3 days	€15.20that's €5.07/day14% more expensive	€13.36that's €4.45/dayRanked higher
Unlimited, 3 days	€10.40that's €3.47/day2% more expensive	€10.22that's €3.41/dayRanked higher
7 days
1 GB, 7 days	€3.80that's €0.54/day8% more expensive	€3.53that's €0.50/dayRanked higher
5 GB, 7 days	€9.00that's €1.29/day1% more expensive	€8.89that's €1.27/dayRanked higher
10 GB, 7 days	€15.20that's €2.17/day14% more expensive	€13.36that's €1.91/dayRanked higher
Unlimited, 7 days	€23.20that's €3.31/day10% more expensive	€21.02that's €3.00/dayRanked higher
15 days
1 GB, 15 days	€3.80that's €0.25/day8% more expensive	€3.53that's €0.24/dayRanked higher
5 GB, 15 days	€9.50that's €0.63/day7% more expensive	€8.89that's €0.59/dayRanked higher
10 GB, 15 days	€15.60that's €1.04/day17% more expensive	€13.36that's €0.89/dayRanked higher
Unlimited, 15 days	€42.20that's €2.81/day7% more expensive	€39.42that's €2.63/dayRanked higher
30 days
1 GB, 30 days	€3.80that's €0.13/day8% more expensive	€3.53that's €0.12/dayRanked higher
5 GB, 30 days	€9.90that's €0.33/day11% more expensive	€8.89that's €0.30/dayRanked higher
10 GB, 30 days	€16.10that's €0.54/day21% more expensive	€13.36that's €0.45/dayRanked higher
Unlimited, 30 days	€60.30that's €2.01/day8% more expensive	€55.69that's €1.86/dayRanked higher

Sirocco is ranked lower on 16 trips: 3 days, 1 GB (€3.80 against €3.53); 3 days, 5 GB (€9.00 against €8.89); 3 days, 10 GB (€15.20 against €13.36); 3 days, unlimited (€10.40 against €10.22); 7 days, 1 GB (€3.80 against €3.53); 7 days, 5 GB (€9.00 against €8.89); 7 days, 10 GB (€15.20 against €13.36); 7 days, unlimited (€23.20 against €21.02); 15 days, 1 GB (€3.80 against €3.53); 15 days, 5 GB (€9.50 against €8.89); 15 days, 10 GB (€15.60 against €13.36); 15 days, unlimited (€42.20 against €39.42); 30 days, 1 GB (€3.80 against €3.53); 30 days, 5 GB (€9.90 against €8.89); 30 days, 10 GB (€16.10 against €13.36); 30 days, unlimited (€60.30 against €55.69).

12 brands compared, not an exhaustive listWhy this ranking?

Compared on price per GB: for each trip, each brand's cheapest plan that covers the duration and the data, at the public price we checked, divided by its GB (at most one and a half times the data requested); for unlimited, the price. Average gap: the mean, over the trips compared, of the difference between the two brands relative to the better ranked one.

Not an exhaustive comparison: 12 brands out of the dozens that sell eSIMs. The list of brands compared is in our Methodology.

eSIMeter is published by Mocom SAS, which sells Sirocco: the site is funded by those sales. No other brand pays us.

Customer ratings

App Store United Kingdom, checked on 27/10/2026. Ratings don't count in the verdict.

Sirocco Our eSIMno rating
Roamless★ 4.8 · 3,295 reviews

Going further

A page per destination is only published if both brands have a price for at least 4 of the 16 trips, and if the better ranked one changes with the trip or the average gap reaches 5%. Otherwise they are still compared in the destination's ranking. Methodology